Vulcanizing-mold.



PATENTED JAN. 8, 1907.

H. Z. COBB.

VULCANIZING MOLD.

APPLICATION FILED AUG. 6, 1906.

2 SHEETS-SHEET 1.

INVENTOR I By After/lays. m @rmA No. 840,749. PATENTED JAN. s, 1907.

' H. Z. COBB.

, VULOANIZING MOLD.

APPLICATION FILED AUG. 6, 1906.

2 SHEETS-SHEET 2.

- (Z J E INVENTOR lTNESSES: ml By Azzomeys.

- Maw,

HENRY Z. COBB, or CHELSEA, MASSACHUSETTS,TASSIGNOR To REVERE RUBBER COMPANY, "E os'ro MASSACHUSETTS, A CDRPORATION OF MASSACHUSETTS.

To all it may'c oiccern i Be it known that I, HENRY Z. COBB, a citizen of the United'States, residing in Chelsea,

- n1 theicounty of Sufiolk and State of Massachusetts, have invented certain new and useful Improvements in Vulcanizing Molds, of

' which the following is aspecification;

In United States "Letters Patent N 0. 792,198, granted to .me on June 13,' 1905, I described and claimed an improved vulcanizing-mold-for rubberhose or'similar articles, by means of which a continuous hose of practically any desired length can be vulcanized.

7 tions.

The moldb therein claimed is formed with a molding-face. which extends sinuously and continuously through the mold, the" latter being constructedof a number of sections which are piled'fiatwise one upon the other and which are so formed that the mold can be built up to any. extent by the addition'of successive l sections while hose. a

My, present invention relates generally to this type of mold, and aims to provide a mold which shall attain'certain advantages inconstructio'n and Operation;

. introducing the Bandy present invention I provide a mold. in W 'ch the intermediate section or sections are recessed, so asto permit the sidewise' introduction of the hose to the moldhig-face, wherebythe mold may be built upwithout reference to the cut away to form tw'oopposing ends, the sections being preferably of true spiral form, so

that the entire number of sections may be identical in shape, thus. making them interand lowering the cost of manu changeable facture.

- In the drawings, wherein I haveshown the preferred form of my invention, Figure] is a side elevation of a complete mold embodying my invention. Fig. 2 1s a dplan of Fig.1 with the Uppersection remove Fig. 3 is a perspective viewofone of the, intermediate s'ec- Fi .4 isv a vlew melevation, showing the severa sections of the molds'eparatedl As shown in'th'e drawings, the mold is built u of a series'of sections, the liapperand lower 0 which (indicatedat A-and are of diflerent construction from the intervuLoAmz memoLb,

' ma be vulcanized in one piece. eac

osition of the end of the hose. In its pre erred form each section'is, constructed in annular shape, with aportion respectively) 1 Patented Jan. 8, 1907..

Y mediate sections C C, being designed to form caps or'end plates between which the intermediate sections are clamped. Each of the sections is formed with a molding-face of the desired contour forthe article to be molded,

such molding-faces being arranged on opposing sides of the adjacent sections, so that when brought together they register to form a complete mold. For molding rubber hose or the like such molding-faces. will take the form of semicirculargrooves a. In this case each of thesections C is preferabl" formed witha mold-groove on each side, t at upon its" lower side registering with the groove of the section-beneath it and that upon its upper side with the it. It is essentia that the two ends of the molding-faced each section shall lie in different planes, so that the lower end of the molding-face of one section shall connect with the upper end of the molding-face of the I section next beneath it. By this means a molding passage or chamber is formed be tween the adjacent sections, which extends continuously and smuousl throughout the mold, the length of which 1s limited only by the number of sections employed, so that a hose .or other article of anypractical length Preferably section is formed with a passage is formed, such grooves being arranged side by side, as bestshown'in Fig. 3L

'My invention introduces an important imin. the present roove of.- the section above plurality of 1 grooves a, so that more than -o ne molding-.

in Fig. 3, where it is indicated by the letter D.

In the particular form shown in,the drawings each of the intermediate sections is constructed as a flat annular bod and in this construction I the recess D is cutting away a portion of the form two opposln' est made by ring, so as to ends 1 b c, separated from each other a suflicient distance ti permit the loo ' of the hose through it. For instance, the section C instead of being made to extend around the major portion of a circle may be made semicircular or even. of less extent, the s ace between thesev ends constitutin in eect, What I term the recess Neit er is it necessary that the mold-groove or molding-face should be completely interrupted, as shown. It is only requisite that the metal shall be cut away sufliciently to permit the passa e of the hose to thegroove. Preferably 'I a o t the annular form shown for the sections I but of course it will be understood that such sections may be of any desired shape, and the moldingfaces instead of extending in general circulardirection, as shown, may be disposed in any manner about the facesof the mold-sections, so long asthey extend con tinuously throughthe mold and are so constructed that a assage is provided for the introduction of t e article to be molded, without requirin that the latter shall be thread ed endwise t ough the sections. By preference, however, I form each section 0, so far as its effective molding-surface is concerned, as a true spiral, as best seen in Fig. 3. This is of particular im ortance in connection with the mold "provi ed by my present invention in that it enables me to construct all of the sections 0 of precisely the same shape, so that "they may be much more economically manufacturedr" It will be observed that as :the sections are imposed one upon the other the end 0 of each section is placed in -contact with the end I) of the section next below it, theunder side of each end 0 bridging the recess D, formed in the next lower section. In

' effect, therefore, each section is turned angularly to the one next below it to an extent equal to that of the recess D. This angular displacement of the successive sections has no effect upon the continuit of the mold if the sections are of true spiral or other analogous form, since the sections fit upon each other irrespective of the relative positions in which'they are placed. This would not be true of the form of section illustrated in my aforesaid patent, wherein the principal portion of the section is flat, the incline or rise being confined to a small part of the section. This form of section, however, may be adapted to my invention by constructing the succ'essive sections in series order, the incline of each. section being formed at such point thereon as will compensate for an angular displacement of the section. In this case, however, the sections would not be interchangeable, but must be used in serial order. Other forms maybe adopted by suitably shaping the successive sections.

It is obvious that the mold may be entirely built up of sections, such as'C but I prefer to utilize upper and lower sections A and B, as before stated, and to form these without recesses, since there is nd necessity of introducing the hose laterally through these sectio as.

In operation the len ths of unvulcanized hose are coiled in suita le buckets or receptacles, and when it is desired to place them in the mold the free ends of the hose are inserted in suitable recesses d in the base-section B, such ends being provided each with a plug or nozzle 9', through which water or other fluid may be admitted to the interior of the hose. The base B may be mounted upon a suitable turn-table or bearing, so that the 'mold may be rotated while the hose is laid along the mold-grooves. After the grooves of the base B are filled a section C is fitted upon the base, the hose being passed into the recess D and laid along the upper grooves of the section C, the rotation of the mold being continued and the successive sections being applied until the requisite length of hose is laid in and the mold built u to the desired extent. As each section is added or at some time thereafter it may be bolted to the next lower section by means of bolts 8 passing through lugsf f so that the sections are prevented from being accidentally displaced.

When the last section is added, the top A is applied and the entire mold bolted together by a series of bolts 9 passing through lugs h, formed in the top and bottom sections. Water or other fluid is then introduced into the hose through the nozzles j, which are then closed and the mold laced in an oven and subjected to the usual vulcanizing temperaturel During vulcanization the water introduced into the hose expands and forms a fluid core, which presses the walls of the hose outwardly into contact with the moldgrooves .in -a Well-known manner.

After vulcanization the mold is taken apart and the hose removed therefrom, during which operation my invention permits the sections to be easily and quickly removed without withdrawing the hose lengthwise from each section.

Although I have described in detail the preferred form of my invention, it is to be understood that I do not wish to be limited thereto, as various changes may be made 'therein without departing from the invention. While I have described my invention in connection with the form of mold set forth IIC in my aforesaid patent, it is to be noted that it is susceptible of use :in connection with molds other than that therein described.

' My invention is not confined to. molds for vulcanizing-rubber hose, but may be utilized with advantage in vulcanizing many other understood that the molding-face. formed only, if desired, or each section may. be

- formed in two or moreparts." These and other modifications are clearly within the scope of my invention. V V WhatI claim is-- 7 1. A vulcanizing-mold for thep ose set forth, comprising in combination, a p urality of mold-sections s'eparably'secured flatwise 'one upon the other and provided ith-molding-faces extending continuously and sinuously through the mold, one of such sections having a recess adapted to permit the sidewise introduction of the article to be molded,

2.- A vulcanizing-mold forthe. purpose set forth, comprising in combination, a plurality of mold-sections separably-secured flatwise one upon the-other, and having a pluralityof moldin '-faces, ea'ch'of which 'extends continuous y and sinuously through the mold; one of such sections having a recess adapted witnesses.

to permit the sidewise introductionof the articleto, be molded. v

' 3. Alvulcanizing-mold for the purpose set forth, comprisingin combination end'plates forming mold-section's, and one 'or moreintermedlate. annular sections all piled flat Wise'one upon the other, and separably secured together and such sections" being pro.-

vided with mol -faces extending contlnuously and sinuous y thro "h the mold, and

being recessed top rmi t t e sidewise introduct on of the articleto be molded.-

41, In a sectional mold, a section having "a molding-face'; the ends of which lie in differ ent planes; such ends being suflicie'ntly separated to emit the sidewlse passage ofthe article to e molded to such face.

5. i In a sectional mold, a substantially an 7 nular section of s iral form recessed to form two opposing en s, such ends being spaced apart sufficientl to permit the introduction between them 0' the article to be molded."

vIn Witness whereof I have hereunto signed Witnesses: r

ARTHUR C. FRASER, THEODORE T. SNELL.

my name in the presence of two subscribing :H-ENRY 2.001313. 

